natus OLYMPIC SMART SCALE 50, Инструкция по эксплуатации

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OLYMPIC SMART SCALE Model 50/51 Instruction Manual 1-5
Description
CHARGING.
The batteries are charging. The scale can be used while the batteries
are charging.
Averaging the Weight of an Active Patient
The Olympic Smart Scale detects movement and accurately calculates the weight
of an active, moving child. When weight-force is applied to the tray, electronic
signals from the load cells are processed by a series of electronic filters and a
microprocessor that detect motion and calculate an averaged weight.
Weight is sampled at 16 Hz (16 samples per second). Every six samples are
averaged to produce one reading. In normal operating mode, this reading is shown
on the display.
When
AVERAGE/UNLOCK
is pressed, an electronic smoothing filter is activated
and each reading (six sample average) is compared to the previous reading. If
the reading is within ±200 g, it is averaged with the previous reading. If eight
consecutive readings are within ±200 g, the weight locks on the display. If, after
sixteen readings, eight readings are not within ±200 g, the scale locks the last
average on the display. This process occurs in just four to six seconds.
To assure accuracy, Natus Medical determined the design parameters for
calculating averaged weight by weighing active infants on a special platform using
a strip chart recorder to measure the dynamic forces generated by the infant’s
weights and movements. The software program for weight-averaging was then
verified by further extensive testing in nurseries.
With its sophisticated weight-averaging techniques, the Model 50/51 can weigh a
moving infant to an accuracy of 20–40 grams.
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